<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>等待开发中</title>
        <style>
            div{
                width: 310px;
                height: 195px;
                position: absolute;
                left: 0;
                top: 0;
                bottom: 0;
                right: 0;
                margin: auto;
            }
        </style>
    </head>
    <body>
        <div>
            <h1>等待开发中...</h1>
        </div>

    </body>
</html>